O Escaravelho do Diabo (The Devil's Scarab, in English) is a Brazilian mystery novel for a young audience, written by Lúcia Machado de Almeida.
The story is centered on Alberto, a medical student who, upon seeing his brother killed after receiving a mysterious package with a beetle inside, decides to investigate.
Originally published in chapters in the magazine O Cruzeiro, between October 10 and December 26, 1953, O Escaravelho do Diabo achieved greater success by being republished in book in 1974 by Editora Ática, in the Série Vaga-Lume (a youth literature series), created in January of the previous year, with illustrations of Mario Cafiero.
Returning home, he noticed, in a magazine, a beetle similar to that which Hugo had received, whose scientific name was Phanaeus ensifer, meaning "sword bearer."
They realize that all the victims of this killer, which happens to be given the moniker "Insect", have something in common: they are all natural redheads, with freckles and hair that remember the color of the fire.